UV Index in Santo Tomas, Mexico

Last updated: September 1, 2025

Understanding the UV Index in Santo Tomas, Mexico is essential for safeguarding your skin and overall health. With intense sun exposure typical of the region's arid climate, knowing the daily UV levels can help prevent painful sunburns and long-term skin damage. From early morning to late afternoon, UV radiation peaks significantly, reaching levels as high as 13 at midday, which poses serious risks without proper protection. By staying informed about the UV Index, you can enjoy the beautiful sunny days of Santo Tomas while ensuring your skin remains safe and healthy.

Hourly UV Index in Santo Tomas

The UV Index starts off modestly at 1 at 07:00, perfect for a leisurely morning. As the day progresses, it ramps up significantly, hitting 10 by 11:00 and peaking at an intense 13 around 13:00 and 14:00. This midday sun intensity necessitates caution, making sunscreen and protective gear essential during these peak hours. As the afternoon rolls into evening, the index gradually declines, dropping to 4 by 17:00 and returning to a low 1 by 19:00, allowing for a safer outdoor experience as the day winds down. Always stay prepared for the sun's powerful rays during the hours of highest UV exposure!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	1	low	45 min
09:00	3	moderate	30 min
10:00	6	high	25 min
11:00	9	very high	15 min
12:00	11	extreme	10 min
13:00	12	extreme	10 min
14:00	11	extreme	10 min
15:00	9	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Santo Tomas

Throughout the year, the UV Index shows significant seasonal changes, with the highest readings occurring from March to September. These months see extreme levels, peaking at 14 in June, with a consistent burn time of just 10 minutes. The high-risk months for UV exposure are February to October, especially March through September. Residents and visitors are strongly advised to take precautions during these times, such as wearing sunscreen, protective clothing, and sunglasses, and seeking shade, particularly during peak sun hours. As the UV Index dips in November and December, attention to sun safety remains important, with high categories still in place.

Monthly Maximum UV Index for Santo Tomas, Mexico

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Santo Tomas. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Santo Tomas, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Santo Tomas UV Index with Other Mexico Cities

The table above highlights how UV exposure in Santo Tomas compares to other major locations across Mexico. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Santo Tomas's solar exposure compared to other cities in Mexico. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Santo Tomas	6	9	11	13	13	14	13	13	12	10	8	6
Guadalajara UVI	9	11	14	14	14	13	13	13	13	12	9	8
Iztapalapa UVI	10	12	14	15	14	14	14	14	14	12	10	8
Ecatepec de Morelos UVI	10	12	14	15	15	14	14	13	14	12	10	8
Mexico City UVI	10	12	14	15	15	14	14	13	14	12	10	8
Puebla UVI	10	12	14	15	15	15	15	14	14	13	10	9